<html>
<head>
	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
	<title>表达尺寸</title>
	<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.0/jquery.min.js"></script>
	
</style>
</head>
<body>
	<div id="div1" style="height:100px;width:300px;padding:10px;margin:3px;border:1px solid blue;background-color:lightblue;"></div>


   	<script>
		$(document).ready(function(){
  			$("#div1").click(function(){
    			$("#div1").width(320).height(320);
  			});
		});
</script>
</body>
</html>